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Question

What is the relative density of a block of mass 15 kg whose volume is equal to the volume of 6 kg water at 4 C?

A

0.3
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B

9
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C

2.5
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D

1
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Solution

The correct option is C
2.5
Mass of the block, M = 15 kg

Volume of block = Volume of water of mass 6 kg at 4C

Volume of block, V =Mass of waterDensity of waterV=6 kg1000 kg/m3 (Density of water.ρw=103 kg/m3)Density of block ρb=1561000=150006 kg/m3

Relative density of block =Density of blockDensity of water=ρbρw

Relative density of block =(150006)1000=156

Relative density of block =2.5

Hence the correct answer is option (c).

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